package chapter6;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class HelloWorldGUI2 {
   
   private static class HelloWorldDisplay extends JPanel {
      public void paintComponent(Graphics g) {
         super.paintComponent(g);
         g.drawString( "Hello World!", 20, 30 );
      }
   }
   
   private static class ButtonHandler implements ActionListener {
      public void actionPerformed(ActionEvent e) {
         System.exit(0);
      }
   }
   
   public static void main(String[] args) {
      
      HelloWorldDisplay displayPanel = new HelloWorldDisplay();
      JButton okButton = new JButton("OK");
      ButtonHandler listener = new ButtonHandler();
      okButton.addActionListener(listener);

      JPanel content = new JPanel();
      content.setLayout(new BorderLayout());
      content.add(displayPanel, BorderLayout.CENTER);
      content.add(okButton, BorderLayout.SOUTH);

      JFrame window = new JFrame("GUI Test");
      window.setContentPane(content);
      window.setSize(250,100);
      window.setLocation(100,100);
      window.setVisible(true);

   }
   
}